公开(公告)号：EP0518129B1

公开(公告)日：1997-01-15

申请号：EP92108925.6

申请日：1992-05-27

申请人： GENERAL INSTRUMENT CORPORATION OF DELAWARE

发明人： Westerfer, Richard ,  Robbins, Clyde ,  Radice, Anthony M.

IPC分类号： H04N7/167

CPC分类号： H04N7/1693

公开(公告)号：EP0518128A2

公开(公告)日：1992-12-16

申请号：EP92108924.9

申请日：1992-05-27

申请人： GENERAL INSTRUMENT CORPORATION OF DELAWARE

发明人： Westerfer, Richard ,  Landgraf, Henry S.

IPC分类号： H04N7/167

CPC分类号： H04N7/1713

摘要： In order to defeat pirate descramblers that detect the occurrence of a vertical blanking interval from a gap in timing data provided on the sound carrier of a scrambled television signal, diversionary pulse information is inserted into the sound carrier during the vertical blanking interval. A pirate descrambler that looks for a gap in data transmitted on the sound carrier will then detect a "false" second gap, and incorrectly phase lock its horizontal oscillator to random video instead of to horizontal timing information that is recoverable during the vertical blanking interval.

摘要翻译： 为了战胜海盗解扰并从在定时提供一个扰频的电视信号的伴音载波上的数据的间隙检测的垂直消隐间隔的发生，牵制脉冲信息在垂直消隐间隔期间插入到声音载波。 海盗解扰器，看起来对于在数据反式的间隙mitted伴音载波上，然后将检测到一个“假”第二间隙，并错误地相位锁定它的水平振荡器随机视频而不是到水平定时信息所做的垂直消隐间隔期间是可恢复的。

公开(公告)号：EP0518129A3

公开(公告)日：1993-05-19

申请号：EP92108925.6

申请日：1992-05-27

申请人： GENERAL INSTRUMENT CORPORATION OF DELAWARE

发明人： Westerfer, Richard ,  Robbins, Clyde ,  Radice, Anthony M.

IPC分类号： H04N7/167

CPC分类号： H04N7/1693

摘要： The scrambling security of a sync suppressed television signal is enhanced by eliminating the fixed time relationship between the normal color burst component and synchronization information in successive lines of the television signal. Transmission of a first plurality of television lines is delayed to achieve a cumulative delay corresponding at least to the duration of a color burst component of the television signal. The transmission of a second plurality of television lines is subsequently accelerated to reduce the cumulative delay. By repeating the delaying and accelerating steps, the location of the color burst component is varied within the television signal over time. Derivation of a substitute horizontal synchronization pulse from the color burst component is thereby prevented.

公开(公告)号：EP0518128A3

公开(公告)日：1993-03-17

申请号：EP92108924.9

申请日：1992-05-27

申请人： GENERAL INSTRUMENT CORPORATION OF DELAWARE

发明人： Westerfer, Richard ,  Landgraf, Henry S.

IPC分类号： H04N7/167

CPC分类号： H04N7/1713

摘要： In order to defeat pirate descramblers that detect the occurrence of a vertical blanking interval from a gap in timing data provided on the sound carrier of a scrambled television signal, diversionary pulse information is inserted into the sound carrier during the vertical blanking interval. A pirate descrambler that looks for a gap in data transmitted on the sound carrier will then detect a "false" second gap, and incorrectly phase lock its horizontal oscillator to random video instead of to horizontal timing information that is recoverable during the vertical blanking interval.

公开(公告)号：EP0518129A2

公开(公告)日：1992-12-16

申请号：EP92108925.6

申请日：1992-05-27

申请人： GENERAL INSTRUMENT CORPORATION OF DELAWARE

发明人： Westerfer, Richard ,  Robbins, Clyde ,  Radice, Anthony M.

IPC分类号： H04N7/167

CPC分类号： H04N7/1693

摘要： The scrambling security of a sync suppressed television signal is enhanced by eliminating the fixed time relationship between the normal color burst component and synchronization information in successive lines of the television signal. Transmission of a first plurality of television lines is delayed to achieve a cumulative delay corresponding at least to the duration of a color burst component of the television signal. The transmission of a second plurality of television lines is subsequently accelerated to reduce the cumulative delay. By repeating the delaying and accelerating steps, the location of the color burst component is varied within the television signal over time. Derivation of a substitute horizontal synchronization pulse from the color burst component is thereby prevented.

摘要翻译： 通过消除电视信号的连续行中正常色同步分量和同步信息之间的固定时间关系，增强同步抑制电视信号的加扰安全性。 第一多个电视线路的传输被延迟以实现至少对应于电视信号的色同步分量的持续时间的累积延迟。 随后加速第二多个电视线路的传输以减少累积延迟。 通过重复延迟和加速步骤，颜色突发分量的位置随时间在电视信号内变化。 由此防止了来自色同步分量的替代水平同步脉冲的推导。